Earthshine

On certain nights
When the angles are right
And the moon is
A slender crescent
It's circle shows
In a ghostly glow
Of earthly luminescence

Extract from lyrics by Neil Peart from the Rush song 'Earthshine' which is track #10 on the album Vapor Trails. I suggest you listen to the remixed version which is sonically much more pleasing than the over-loud original.

The bright object above the moon in this picture is Venus. The faint glow is caused by very thin cloud cover diffusing the light.